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Performance: chat input #25758

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merged 101 commits into from
Aug 25, 2023
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@hannojg hannojg commented Aug 23, 2023

Details

This PR improves the performance of the ReportActionCompose component greatly.
The main improvement is that we moved state down into separated components. In the ReportActionCompose component we render a lot of items, such as the send button, emoji button, a menu for attachments, attachment picker popups, the composer itself, comment exceeding notice, mention suggestions, emoji suggestions, etc. When we entered one letter all the top level state was updated multiple times, leading to a lot of re-renders of all the mentioned components.

So, to achieve a better performance we needed to break out more separate components. This also cleaned up the ReportActionCompose component, it went down from 1362 lines to 410 lines, thus becoming a lot easier to read and maintain.

However, this made the PR a bit larger than anticipated. The following gives an overview of the changes to help review this PR.

Note

I'd recommend first looking at the code itself and understanding its structure, and then checking the specific diffs of this PR.

The ReportActionCompose was moved into its own folder under src/pages/home/report/ReportActionCompose. Here are all new split out components placed:

  • SendButton.js: The JSX of the send button was moved into its own component for cleanup
  • Suggestions.js: Before the mention and emoji suggestions were part of the main composer, and also their state was placed there. The composer itself doesn't have to re-render when we change the suggestion state, so it was moved into its own component.
    • SuggestionMention.js: Before the mention suggestion were re-rendering when e.g. the emoji suggestions were changing. Now they are decoupled into their own places.
    • SuggestionEmoji.js: Separate implementation for emoji suggestions
  • AttachmentPickerWithMenuItems.js: This contains the options we show when pressing the + in the composer. The options need access to the attachment picker, so they are grouped together. They also had state that's unnecessary to other parts of the composer.
  • ComposerWithSuggestions.js: Here lives the actual <Composer /> and its value and selection state. Only the <Composer /> and the <Suggestions /> need to re-render when any of the two states are changing, hence they are grouped together.
  • SilentCommentUpdater.js: This components subscribes to the actual draft comment, and fires a side effect for certain conditions. For the other components we don't need the draft comment, so it makes no sense re-rendering these. That's why it was split out into its own component for performance.

Another note: Initially I wanted to make separate PRs for each split out component, but: the components were so entangled with each other, that it was only possible to make a full clean up 🍝😅 .

Fixed Issues

$ #25763

Tests

  1. Open the expensify desktop app
  2. Let the app open, login, navigate to a chat
  3. (If you have a powerful PC and usually don't experience a lag typing:)
  • Open the developer tools
  • Go to performance
  • Enable CPU Throttle: 6x
  • Enable Hardware concurrency limit: 8
  1. Just press your keys as fast as you can (typing random stuff)
  2. Notice, that there is a lag while typing
  3. Checkout this branch / changes
  4. Run the same steps 2.-5. as above and confirm that the lag is gone (Note: There might be a lag for the very first letter that you type, for which this PR doesn't optimise)

From main branch

main.mov

From this branch

improved.mov

Offline tests

n/a

QA Steps

  • Run every test for the composer and check that there are no regressions.

PR Author Checklist

  • I linked the correct issue in the ### Fixed Issues section above
  • I wrote clear testing steps that cover the changes made in this PR
    • I added steps for local testing in the Tests section
    • I added steps for the expected offline behavior in the Offline steps section
    • I added steps for Staging and/or Production testing in the QA steps section
    • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
    • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
    • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
  • I included screenshots or videos for tests on all platforms
  • I ran the tests on all platforms & verified they passed on:
    • Android / native
    • Android / Chrome
    • iOS / native
    • iOS / Safari
    • MacOS / Chrome / Safari
    • MacOS / Desktop
  • I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
  • I followed proper code patterns (see Reviewing the code)
    • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick)
    • I verified that the left part of a conditional rendering a React component is a boolean and NOT a string, e.g. myBool && <MyComponent />.
    • I verified that comments were added to code that is not self explanatory
    • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
    • I verified any copy / text shown in the product is localized by adding it to src/languages/* files and using the translation method
      • If any non-english text was added/modified, I verified the translation was requested/reviewed in #expensify-open-source and it was approved by an internal Expensify engineer. Link to Slack message:
    • I verified all numbers, amounts, dates and phone numbers shown in the product are using the localization methods
    • I verified any copy / text that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is approved by marketing by adding the Waiting for Copy label for a copy review on the original GH to get the correct copy.
    • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
    • I verified the JSDocs style guidelines (in STYLE.md) were followed
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
  • I followed the guidelines as stated in the Review Guidelines
  • I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
  • I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
  • I verified any variables that can be defined as constants (ie. in CONST.js or at the top of the file that uses the constant) are defined as such
  • I verified that if a function's arguments changed that all usages have also been updated correctly
  • If a new component is created I verified that:
    • A similar component doesn't exist in the codebase
    • All props are defined accurately and each prop has a /** comment above it */
    • The file is named correctly
    • The component has a clear name that is non-ambiguous and the purpose of the component can be inferred from the name alone
    • The only data being stored in the state is data necessary for rendering and nothing else
    • If we are not using the full Onyx data that we loaded, I've added the proper selector in order to ensure the component only re-renders when the data it is using changes
    • For Class Components, any internal methods passed to components event handlers are bound to this properly so there are no scoping issues (i.e. for onClick={this.submit} the method this.submit should be bound to this in the constructor)
    • Any internal methods bound to this are necessary to be bound (i.e. avoid this.submit = this.submit.bind(this); if this.submit is never passed to a component event handler like onClick)
    • All JSX used for rendering exists in the render method
    • The component has the minimum amount of code necessary for its purpose, and it is broken down into smaller components in order to separate concerns and functions
  • If any new file was added I verified that:
    • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
  • If a new CSS style is added I verified that:
    • A similar style doesn't already exist
    • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(themeColors.componentBG))
  • If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
  • If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
  • If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
  • If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
  • If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.
  • I have checked off every checkbox in the PR author checklist, including those that don't apply to this PR.

Screenshots/Videos

Web
Screen.Recording.2023-08-23.at.12.15.57.mov
Mobile Web - Chrome
Screen.Recording.2023-08-23.at.12.15.24.mov
Mobile Web - Safari
Simulator.Screen.Recording.-.iPhone.14.Pro.-.2023-08-23.at.12.20.42.mp4
Desktop
improved.mov
iOS
Simulator.Screen.Recording.-.iPhone.14.Pro.-.2023-08-23.at.12.26.56.mp4
Android
Screen.Recording.2023-08-23.at.12.12.12.mov

…ction' of github.com:margelo/expensify-app-fork into perf/composer-investigations
…ction' of github.com:margelo/expensify-app-fork into perf/composer-investigations
This reverts commit eb9baf8.
…ction' of github.com:margelo/expensify-app-fork into refactor-report-action-compose
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🚀 Deployed to production by https://github.com/luacmartins in version: 1.3.58-5 🚀

platform result
🤖 android 🤖 success ✅
🖥 desktop 🖥 success ✅
🍎 iOS 🍎 success ✅
🕸 web 🕸 success ✅

@OSBotify
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🚀 Deployed to staging by https://github.com/mountiny in version: 1.3.59-0 🚀

platform result
🤖 android 🤖 failure ❌
🖥 desktop 🖥 success ✅
🍎 iOS 🍎 success ✅
🕸 web 🕸 success ✅

@OSBotify
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🚀 Deployed to production by https://github.com/luacmartins in version: 1.3.59-5 🚀

platform result
🤖 android 🤖 success ✅
🖥 desktop 🖥 success ✅
🍎 iOS 🍎 failure ❌
🕸 web 🕸 success ✅


const reportRecipient = personalDetails[participantsWithoutExpensifyAccountIDs[0]];
const shouldUseFocusedColor = !isBlockedFromConcierge && !disabled && isFocused;
const isFullSizeComposerAvailable = isFullComposerAvailable && !_.isEmpty(value);
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cc @hannojg It looks like the logic within this line was not preserved and it caused a regression in this issue #25975, more context.

maxLines={maxComposerLines}
onFocus={onFocus}
onBlur={onBlur}
onClick={setShouldBlockSuggestionCalc}
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Is this intended? Previously we used to set shouldBlockEmojiCalc and shouldBlockMentionCalc to false but now this being set to true.

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I dont think there should be change in the behaviour here, not intentionally

[isKeyboardShown, isSmallScreenWidth, parentReportActions, report, reportActions, reportID, submitForm, suggestionsRef, valueRef],
);

const onSelectionChange = useCallback(
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Coming from #26534

We should've ensured to open the suggestion list only when the composer is focused, to prevent unexpected behavior.

const {translate} = useLocalize();

const Tap = Gesture.Tap()
.enabled()
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Enabled condition was not preserved !(isCommentEmpty || isBlockedFromConcierge || disabled || hasExceededMaxCommentLength) and caused regression #27779

* @param {String} reportID
* @param {String} comment
*/
const debouncedSaveReportComment = _.debounce((reportID, comment) => {
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This caused a regression of showing draft icon - more information here - #27362 (comment)

}

const valueAfterTheCursor = value.substring(selectionEnd);
const indexOfFirstWhitespaceCharOrEmojiAfterTheCursor = valueAfterTheCursor.search(CONST.REGEX.NEW_LINE_OR_WHITE_SPACE_OR_EMOJI);
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This regex NEW_LINE_OR_WHITE_SPACE_OR_EMOJI never existed which caused #28754

@situchan
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situchan commented Nov 7, 2023

As talked already, this caused super minor style regression:
wider gap between mention or emoji suggestion box and composer

@burczu
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burczu commented Jan 8, 2024

It seems like it caused this regression as well: #30921 (discrepancy between create and edit mode in terms of shown max message length limit error).


const [highlightedEmojiIndex, setHighlightedEmojiIndex] = useArrowKeyFocusManager({
isActive: isEmojiSuggestionsMenuVisible,
maxIndex: SuggestionsUtils.getMaxArrowIndex(suggestionValues.suggestedEmojis.length, isAutoSuggestionPickerLarge),
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👋 Coming from #33613
SuggestionsUtils.getMaxArrowIndex did return visible list length (instead of true list length), which meant that you couldn't scroll past the visible items using a keyboard
We resolved this with
maxIndex: suggestionValues.suggestedMentions.length - 1

useEffect(() => {
// Value state does not have the same value as comment props when the comment gets changed from another tab.
// In this case, we should synchronize the value between tabs.
const shouldSyncComment = prevCommentProp !== comment && value !== comment;
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this caused a race where some characters will be skipped when typing on the same interval - more info #37356

(text, shouldAddTrailSpace = true) => {
const updatedText = shouldAddTrailSpace ? `${text} ` : text;
const selectionSpaceLength = shouldAddTrailSpace ? CONST.SPACE_LENGTH : 0;
updateComment(ComposerUtils.insertText(commentRef.current, selection, updatedText));
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This line caused this issue:
#41778

More detail about the RCA here:
#41778 (comment)

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